Fluid-pressure regulator.



'I'. B. PULTON. FLUID PRESSURE REGULATOR. APPLICATION FILED DB0.11,1907.

Patented Oct. 6,l 1908.

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LOUIS 'B. FULTON, OF PITTSBURQPENNSYLVANIA, ASSIGNOR TO TEE CHAPLIN'QFULTON MANUFACTURING COMPANY, OF PITTSBURG, PENNSYLVANIA, AA CORPORATION OF PENNSYLVANIA.

Specification o! Letters-Patent.

FLUID-PRESSURE REGULATOR.

l Patented Oct. 6,

Appxigauonnled member 11, 1907. serial No. 408,060.

To all whom 'it may comme:

Beit known that'I, LOUIS B. FULTON, of Pittsbu in the county of Allegheny and Stateof emisylvania, have invented certain new and usel'u Improvements in Fluid-Pressure Regulators; and I do hereby declare the following 'to be a full, clear, and exact description of the invention, such as will'enable others skilled in the vart to which it appertains to make anduse the same.

The primary object of this invention is to provide means for controlling a {luid-pressure regulator from the high-pressure side thereof without the use of an auxiliary'high-pressure regulator, thereby lessening the cost and Simp the construction, while at the same time insuring the quick seating, or partial seating, and opening of the regulating valve to maintain a practically uniformpressure inthe service mains on the low-pressure side of the regulator.

The invention will be hereinafter fully set forth. and particularly pointed out in the claims.

Inthe accompanyi drawings, Fi ure 1 is a side elevation, art y in section. i0. 2 is a similar view, s owing a slight modi cation.

' Referring to the drawings, 1 designates th high-pressure main; 2 the casing ofthe regulating valve, and 3 the low-pressure orfservice main leading from the outlet side .of the valve casing. The regulating valve, as a whole, corresponds to that shown and described in Letters Patent No. 845,708, issued to me February 26, 1907 The valve regulating means embodies two opipositely mov-y able ldiaphra'gms 4 located wit 'n the superaphra being communicated through a weighte lever 6 andlink 7 to a weighted pipe 10 is a stricture `12 forming a reduced opening so as to transmit pressure to 'the diaphragm casing through the medium of a essened but variable volume of gas, or other fluid, from the high pressure side of the reguator.

osed casing 5, the movement of the upper Also withm this pipe 10,'between'the stricture and the diaphragm casing, I prefer.-

abl locate a cut-off valve "13, which is nor? ma ly held unseated by asp 14. When j the pressure in casin 5 effects t e seating, or

low-pressure main 3 with the diaphragm casing, and within this. pipe 16 is located an auxiliary low-pressure regulator 17 whichisautomatically seated' upon an increase of pressure in the service or low-pressure mains. When this occurs the normally constant pressure in the diaphragm casin increases to an extent sufficient to cause t e quick complete or partial seating of they regulator valve which remains in the position to which it is moved until the pressure in the service mains falls, whereupon the auxiliary low-pressure regulator opens and allows the normal constant pressure to be restored in the diaphragm cas- 'ng, the regulator valve being openedby the Weighted lever 9.

To obviate from' any excess pres- I sure in the, diaphragm casing, I provide a relief-valve 19, which, when-unseated by excess of fluid-pressure, allows such fluid topass through a pipe 18 to the low pressure side. This valve is vshown as locatedbetween the 'auxiliary low-pressure regulator and the diaphragm casing, and the pipe 18 as openinginto ipe 16. When the ,cut-oli. valve 13 1s emp oyed, this relief valve isof advantage :only 1n the event of leakage around such cut-oli valve, .since otherwise the latter prevents the building up of pressure in the diaphragm casing in excess of what is require -for the seating of the regulator valve.

. The advantages of my resent im rovementswill be apparent to t oseskille in the art. It will be lobserved that a reduced and variable volume of fluid under pressure' from the high-pressure side ofthe regulator is constantly supplied to theA diaphragm casing and the quick seating or partial seatin an o ening of the regulator valve is e ected Without theuse of an auxiliary highressure regulator. The seating of ythe-'cut-o valve.,

' the diaphragm, and means for conveying the parts yare adjusted to insure a practically uniform pressure in the service mains without the necessity of completely cutting off the assage of the high-pressure into the diapgragm casing. The use of this valve, however, is of advantage as an additional safe-guard against undue pressure in the diaphragm casing in the event of the demands on the service mains being entirely discontinued or lessened to a degree greater than ordinarily occurs. In either event the seat' of valve 13 cuts off all flow until the norma pressure in the service mains is restored.

l claim as my invention:

1. A fluid-pressure regulator comprising a controlling-valve, a diaphragm, a casing or the latter, a pipe leading from the high-pressure side of said valve to said casing for supplying a lessened and variable volume of uld under pressure to said casing, a second pipe connecting said casing with the lowpressure side of the valve, an auxihary lowpressure regulator within such-latter pipe, a valve for relieving excess fluid pressure pln t e excess fluid to the low-pressure side o the controlling valve.

2. A fluid-pressure regulator comprising a controlling valve, a diaphragm, a casing for the latter, a pipe leading from the high-pressure side of said valve to said casing, a stricture in said ipe, a lessened and variable volume of fluid) under pressure being supplied through said pipe to said casing, a second pipe connecting said casing with the lowpressure side of the valve, an auxiliary lowpressure regulator Within such latter pipe, a valve for relieving excess luid pressure on the diaphragm, and means for conveyinOv the excess fluid to the low-pressure side ci? the controlling valve.

3. A iluidressure regulator comprising a valve, a diapiiragm, a casing for the latter, a pipe leading from the high-pressure side of said valve to said casing, a cut-off valve in said pipe, a second pipe connecting said casing with the low-pressure side of the valve, an auxiliary low-pressure regulator within such latter pipe, and means actuated by the pressure in t e diaphragm casing for effecting the seating of said cut-0H valve.

4. A Huid-pressure regulator comprising, in combination, a valve, a diaphragm connected to such valve, a second daiaphragm, said diaphragmsbeing movable in opposite directions, a casing for such diaphragms, le'- vers actuated by the movements of said diaphragms, a connection between said levers, one of said levers tending to unseat such valve, a pipe connecting the dia hragm casing at a point between the diap ragms with the high-pressure'side of said valve and constructed to su ply a lessened and variable volume of ilui under pressure, a second pipe connecting said casing with the low-pressure side of the valve, an auxiliary low-pressure regulator in said second pipe, and a valvecontrolled by-pass connected to such second pipe on opposlte sides of said auxiliary lowpressure regulator.

5. A fluid-pressure regulator comprising, in combination, a valve, a dia hragm connected to such valve, a secon diaphragm, said diaphragms being movable in opposite directions, a casing for such diaphragms, levers actuated by the movements of said diaphragms, a connection between said levers, one of said levers tending to unseat such valve, a pipe connecting the diaphragm casing at a point between the diaphragms with the high-pressure side of said valve and constructed to supply a lessened and variable volume of Huid under pressure, a second pipe connecting said casing with the low-pressure side of the valve, an auxiliary low-pressure regulator in said second pipe, and a cut-off va ve in the iirst mentioned pipe designed to be seated by one of said levers when the auxiliary low-pressure regulator is seated.

6. A duid-pressure regulator comprising, in combination, a valve, a dia hragm connected to such valve, a secon diaphragm, said diaphragms being movable in opposite directions, a casing for such diaphragms, lcvers actuated by the movements of said diaphragms, a connection between said levers, one of said levers tending to unseat such valve, a pipe connecting the diaphragm casing at a point between the diaphragms with the high-pressure side of said valve and con- LOUIS B. FULTON.

Witnesses:

CHAs. W. TowNsEND, (LE. McCARGo.

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